* {
	margin: 0;
	padding: 0;
}
ul {
	list-style: none;
}
// 操作面板
.plan {
	display: flex;
	// 数字键盘
	.numbers {
		width: 90%;
		display: flex;
		flex-wrap: wrap;
		flex-direction: row-reverse;
		align-items: center;
		justify-content: center;
		li {
			text-align: center;
			width: 100px;
			height: 100px;
			border: 1px solid lightblue;
			border-radius: 4px;
			cursor: pointer;
			margin: 0 5px;
		}
	}
	// 计算面板
	.compute {
		li {
			border: 1px solid lightblue;
			padding: 0px 4px;
			text-align: center;
			margin: 2px 0;
			cursor: pointer;
		}
	}
}